Understanding Interface Types:
This section describes the different types of exchangers compatible interface reference section contains information about how to configure more of these interface types. The remainder of this chapter describes the switch port configuration process.
Unique 2 layer associated with the physical port interface of the switch port. 2 associates a physical interface and Protocol for management, not to do routes or bridges. A switch port can access the port or trunk port.
You can configure the port as an access port or trunk port, or dynamic Trunking Protocol (DTP) port operation to determine whether the switch port must visit a port or trunk port chains through negotiation on the basis of the port at the other end of the road.
Using the configuration switch switch port interface configuration command. For more information on how to configure the access port and trunk ports feature, see the "Configuring Vlan".
The following sections describe these types of interfaces:
Access Ports:
Only one VLAN access port belongs and carrying traffic (unless it is configured as a voice VLAN ports). Traffic is received and sent native format with no VLAN tags. Traffic reaches the access ports are presumed to belong to the VLAN assigned to the port. Receive 802.1 p-if the access port or VLAN 802.1 q-is assigned to the port marked data and forwarding the datagram. If the port receives another VLAN 802.1 p or 802.1 q-mark datagram, the datagram is discarded, the source address is not learned a lesson, counted on for no apparent reason and frame statistics.
Catalyst 2940 switches do not support ISL tagged datagrams. If the switch receives a datagram marked ISL, is the date of receipt of the data is reported to have been flooded in because MAC ISL tag in the datagram's destination address is a multicast address in the native VLAN of the port.
Supports two types of access ports:
In the Static access port manually assigned to a VLAN.
The dynamic access port VLAN membership is an incoming datagram by understanding. By default, dynamic access port is the port VLAN is not VLAN members and members when they were found only enabled forwarding to and from port. Dynamic access switch ports are assigned VLAN VLAN membership policy server (VMPS). VMPS 6,000 can be a catalyst series switches catalyst 2940 switch VMPS feature is not supported.
You can also configure the access port and connect a Cisco IP telephony traffic and another VLAN to VLAN from the device connected to the phone's data flow. For more information on voice VLAN ports, see the "Configuring Vlan".
Port-Based VLANs:
Piecewise functions, teams, or on a VLAN is a logical application, regardless of the physical location of the user's exchange network. For more information on Vlan, refer to "Configuring Vlan". Port receives datagrams are forwarded only to belong to the same VLAN as port of the receiving port. Network devices in a different Vlan cannot communicate with each other, there are layer 3 devices, routing traffic between Vlan.
VLAN provides hardened firewall for traffic on VLAN and MAC address table for each VLAN has its own. When a local port to be configured with VLAN, is associated when the VLAN Trunking Protocol (VTP) learned of its existence from the neighbors, or when a user creates a VLAN VLAN on the trunk was born.
Normal range you want to configure Vlan (VLAN Id 1-1005), use the VLAN VLAN ID or VLAN database VLAN global configuration command to enter configuration mode privileged EXEC command to enter VLAN configuration mode. VLAN VLAN Id the VLAN 1-1005 configuration stored in the database.
To add the port to the VLAN by using switch port interface configuration command:
Interface.
· For relay port, set the characteristics of the trunk, and if necessary, define, and Vlan to which it belongs.
· For access to port settings and define the VLAN to which it belongs.
Connecting Interfaces:
Within a single VLAN device can communicate directly through any exchanger. Exchanging data in different ports in the Vlan cannot, and will not be routed through the routing device, or interface.
With standard second-layer exchanger, different port must be in the Vlan through routers exchange information. In the configuration shown in Figure 9-1 in VLAN 20 when host a sends data to a host in VLAN 30 b, it must be from the host to the switch to the router, on a back to exchanger and then to host b.
Using the Interface Command:
To configure physical interfaces (ports), please use the interface global configuration command to enter interface configuration mode, and specifying the interface type, slot and quantity.
• Fast Ethernet (FastEthernet, or FA) for the ten-one hundredths Ethernet or Gigabit Ethernet (gigabitethernet, or GI).
· Slot switching (this Exchange is always 0 on) on the slot number.
· The interface number of the Port number on the switch. Starting from port number is always 1, starting from the left facing the front of the switch, for example, FastEthernet, and FastEthernet zero-first. If you have multiple media types (for example, ten-one hundredths port and Gigabit Ethernet port), port numbers, start again with the second media: gigabitethernet zero-first.
You can physically check the interface identifies the physical interface on the switch. You can also use the Cisco IOS privileged EXEC command to display information about a specific interface or all interfaces on the switch. The remainder of this chapter provides the physical interface configuration process.
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